index.html ->：<form name="punchout_form" method="post" action="https://openapi-sandbox.dl.alipaydev.com/gateway.do?charset=utf-8&method=alipay.trade.page.pay&sign=eoD2c8w7I9fLznj%2FGpRnz7GE8ZUHqg0Xux%2F0x4ZJfSI06GYxxGW7Oa%2FjBZdIb1cSjcwGNi656QS7YpAzEIYjklYdm%2B60OZ7WxyGUV50agAimQTbK1mbZAMzjXFQ%2BewX19%2F9NB9JskZ0GuJH4ly%2FqF6fSTC51nhpV%2BqTuN9%2BP6padKTFgf4LP9mKjwr8JOXCHauQyhdd2W%2FADqs4h3NvUMyH%2FSIwOMUtNLE9s%2B8xwjlo4%2FmKGwIdqweUfFsRTT3zfoUu2RuBuF5VmgYyo6vYtKlhMLDrtk0k8QW74i1d9h5rcFg7URIM9VLPII64NyyRc4mi3c9EyRun8%2BQdoNgN7aw%3D%3D&return_url=https%3A%2F%2Fgaga.plus&notify_url=http%3A%2F%2Fwyl-studio.natapp1.cc%2Fapi%2Fv1%2Falipay%2Falipay_notify_url&version=1.0&app_id=9021000151611942&sign_type=RSA2&timestamp=2025-09-08+10%3A04%3A24&alipay_sdk=alipay-sdk-java-4.38.157.ALL&format=json">
    <input type="hidden" name="biz_content" value="{&quot;out_trade_no&quot;:&quot;wyl202509057526&quot;,&quot;total_amount&quot;:&quot;0.01&quot;,&quot;subject&quot;:&quot;测试商品&quot;,&quot;product_code&quot;:&quot;FAST_INSTANT_TRADE_PAY&quot;}">
    <input type="submit" value="立即支付" style="display:none" >
</form>
<script>document.forms[0].submit();</script>